Cooling jacket fabrication



Nov. 15, 1938. J. w. DAWSON COOLING JACKET FABRICATION Filed April 7, 1957 INVENTOR Jln MDan so v. Y

ATTORNE he... Nov. 15, 1938 2,137,044

UNITED STATES PATENT OFFICE .137,044 COOLING JAcKEr FABRICATION John W. Dawson, East McKeespoi-t, Pa., assignor to Westinghouse Electric & Manufacturing Company, East Pittsburgh, Pa., a corporation 01 Pennsylvania Application April 7, 1937, Serial No. 135,484 1 Claim. (Cl. 29157.3)

My invention relates to cooling jacket fabrimember [3, preferably having the members so cation, and especially to cooling jacket fabricathat the member i is of lighter or more flexible tion for electron dischar e devices. material than the member is and having a fricand at the same time provides means to provide Fig ressure preferably of he hydraulic adequate velocity of the cooling medium and also type is then applied at edge H by means of the adaptable to special fitting requirements. inlet l6 and the lighter and more flexible mate- Other objects and advantages of my invention rial i0 under this hydraulic pressure from a tion. The spot welding is, of course, performed by utivention, If desired, the sheet member can form a cool- Fig. 3 is a cross sectional view of a modification ing jacket directly on the exterior casing I8, as of the structure of Fig. 2 shown in Fig. 2. This casing may be part of a 20 g. 4 is a front elevational view of my invenmain electrode structure such as the cathode tion applied where a protuberance on the casing structure containing the vaporizable mercury l8 exist s, shown The sheet metal may be formed into Fig 5 is a rear elevational view of Fig. 4, helical corrugations l9 'and slipped over the ex- Fig. 6 is an elevational view of a still further terior casing or main electrode structure and 5 modification of my invention, hen spot or seam welded in the troughs 20 Fig. 7 is a partial view of Fig. 5 with element where they contact with the casing. If desired, removed, and the cooling jacket can also be formed by first Fig. 8 is a partial sectional view of a still furslipping a rather tight fitting cylindrical sheath 0 ther modification of the invention. member over the exterior main electrode i 8 and 30 ing to terminate at the upper edge 12. These In case it is not desired to have water or other helical path for the cooling medium through the sweated by solder 22 to the tube wall 18, as discrest ll of the corrugations and these crests are closed in Fig. 3.

spaced from one another by the troughs IS. The My n e t o also is ap le Wher the tube troughs i5 may be welded by spot welding to the wall has a protuberance as 32 in Fig. 4 such as inner member i3. These spot welds may extend would be caused by a grid or starting electrode around the helical portion of the troughs i5 and lead insulated through the cathode wall. In such In place of corrugating the member in and then have the helical corrugations preformed therein velding it to the inner cylindrical member I3, I or may have them subsequently formed by the The corrugations will. it preformed therei adjacent one another, and it is preinternttins camera as illustrated at 2! and I, Figs. 5 and '1. A continuous portion oi the coil at the lower edge 0! the member around the protuberan adjacent edge portion of the member I is likewise curved around the protuberance 82 The two ends of the corrulations at ll and I! are cut 01! on an angle of about 45 as ilius Fig. I. A member 3| curved to it over the v-shaped cut in the two coils is placed thereover and welded thereto.

If desired, the two members 2| and 28 mayflbe !l and having cut rtions to fit around the protuberance of a plate could then of the members or members in a helical path. weld would curve around the protuberance at I! 25 into the helical ducts for the cooling medium.

Another modification is illustrs in which a double helical spot and 50 illustrated by the dotted lines ll, 4!, ll, ll, ll" and H", ll'" and li'". ll, II'JI" and ll' are continuations oi the same helical spot or seam weld. ll, ll, ll", ll' are likewise continuations oi the same helical spot or seam weld. lhe portion between the welds ll and ii and also between 40' and ll, etc., are enlaried. into cooling ducts by restor terial oi the intermediate portion between ll and ill, H and ll", etc., series of openings 42 therein, thus makinl coolth open sides.

ing coil cylindrical member wi this particular modification has many specific panded member 44 surroun the space around the anode and the openings l2 provide a ready passage for the electrons to the anode wi In Fig. 8, I have discl flcation of my invention.

cup wall containing the mercury, may ha grooves 46 therein, preferably in the form 0! a continuous helical groove. Two members 41, II in sheet iorm conio ber ll are slipped sheets are then spot or seam smooth part or the casing and preferably in a double seam weld at ll and MI extendinz in a continuous helix as at l! and 5! adjacent the edges oi the grooves 46. Hydraulic pressure is then applied between ll with the result that member 41 expands-into the grooves 4' at ii. The member 48 may be of a stifler material or thickness as not to be exbut preferably it is likewise expanded at l! to form an enlarged um 1. while I have shown and described several pre- (erred modifications of my invention, it is apparmade without departing irom the spirit or my insu vention. Accordingly, I desire only such limitations to be imposed upon the following claims as are necessitated by the prior art.

a device having a protuberance which comprises the other part of said protuberance and the two members 41 and 20 duct for the cooling :35 

